Test tube racks
thingiverse
This A4-sized sheet features three designs for test tube racks that can accommodate six 15mm tubes securely. Assemble by cutting and slotting together components; each rack has a blank base, lower piece with recesses for test tube bases, and an identical upper piece. Attach long rectangles vertically for stability - glue is recommended. The design is suitable for 3mm material, but adjust the slot widths if using different thicknesses.
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